Invulnerability Analysis of Networked Information System Topologies Based on Core & Coritivity Theory

Invulnerability of network is the important support for expedite communication.The definition of network invulnerability is given,networked information system is expressed by using graph theory.And on that basis,taking a networked information system topology for example,its core and coritivity are counted,the invulnerability of networked information system in coritivity sense is analyzed.The results indicate that,in coritivity sense,the networked information system topology isn′t the best invulnerability topology.Node 13 is the core of this networked information system and it is supposed to be key protected.